Estelle Bee Dagum, an Argentine statistician, died on April 3, 2026, at age 91.
Born in Córdoba, Argentina, in 1935, she was an Argentine and Canadian economist and statistician and a professor chiara fama of statistical sciences at the University of Bologna. Dagum was known for her research on time series analysis, particularly for developing the X-11-ARIMA method of seasonal adjustment, which became widely used and later informed X-12-ARIMA and related methods.
She also co-authored books on benchmarking and seasonal adjustment methods.
Estela “Estelle” Bee Dagum (January 8, 1935 – April 2, 2026) was an Argentine and Canadian economist and statistician who was a professor “chiara fama” of statistical sciences at the University of Bologna. She is known for her research on time series analysis, and in particular for developing the X-11-ARIMA method of seasonal adjustment, which became widely used and is a predecessor to X-12-ARIMA and later methods.